The Laerdal Medical stiff neck cervical collar offers you four sizing options contained within the one collar. Providing superior immobilisation and stabilisation, this collar is built for all patients of all shapes and sizes. Each sizing option is locked securely into place yet can be fully adjusted at any point using a few simple steps. The directions are molded into the collar to ensure any given user knows exactly what they are doing. The sizing and application is the same as the original stiff neck collars whilst the oxygen mask/ nasal cannula hooks are much more robust than the previous iteration. The materials used are radiolucent making the collars CT & MRI scan compatible. If your looking safety and reliability this is the product for you.